Answer:
this is true it neutralise easily
It is true that in the DNA isolation process, cells are mixed with sodium chloride (i.e. NaCl) because the sodium (Na ) neutralizes the negative charge of DNA.
What is DNA isolation?DNA extraction is a method of separating DNA from cell membranes, proteins, and other cellular components using physical and/or chemical methods from a sample. In 1869, Friedrich Miescher isolated DNA for the first time.
The ability to extract DNA is critical for studying the genetic causes of disease and developing diagnostics and drugs.
It is also required for forensic science, genome sequencing, detecting bacteria and viruses in the environment, and determining paternity.
Because sodium (Na+) neutralizes the negative charge of DNA, cells are mixed with sodium chloride (i.e. NaCl) during the DNA isolation process. It makes homogenization easier.
Thus, the given statement is true.
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Which is biotic?
O water
O temperature
beeswax
rocks
Beeswax because it is a livong thing
The biotic factor among the options given is beeswax, which is the third option, as the biotic factors are living or once-living organisms in an ecosystem that directly or indirectly affect other organisms.
What is a "biotic factor"?Biotic factors are living or once-living components of an ecosystem that have a direct or indirect effect on the survival, growth, and reproduction of other living organisms. Examples of biotic factors include plants, animals, fungi, bacteria, and other microorganisms that are part of the ecosystem. Beeswax, as mentioned, is a biotic factor because it is produced by living organisms, specifically bees. Beeswax is used by bees to build their hives or nests, which are important structures for their survival and reproduction.
Hence, the biotic factor among the options given is beeswax, which is the third option.
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Explain in detail if the water molecule (top) can interact with the glucose molecule (bottom)
Answer:
Yes, glucose dissolves in water.
Explanation:
Hello,
In this case, we can state that glucose is largely soluble in water due to the fact that it has five of polar hydroxyl groups which can interact with the hydrogen atoms in the water throughout the hydrogen bonds. Such hydrogen bond is known as an intermolecular force that forms a special type of dipole-dipole attraction when a hydrogen atom bonded to a strongly electronegative atom (like the oxygen in the hydroxyl groups) exists in the vicinity of another electronegative atom with a lone pair of electrons, therefore they occur among molecules.
What is the metaphor for been weevil
Answer:
The scarab or dung-beetle, and the spider to some ancient symbologists
What is the retrovirus, and how does it work? Name an example of a retrovirus.
Answer:
A retrovirus is a type of RNA virus that inserts a clone of its genome into the DNA of a host cell that it invades. An example of a retrovirus would be HIV.
Hope this helps! :)
Explanation:
A retrovirus is a specific kind of RNA virus that, when it infects a host cell, will insert a clone of its genome into the DNA of the host cell. HIV is an example of a retrovirus that may infect humans.
What is a retrovirus?A kind of RNA virus known as a retrovirus copies its genome into the DNA of the host cell it invades. HIV is a prime example of a retrovirus.
A virus that employs RNA as its genetic material is referred to as a retrovirus. When a cell becomes infected with a retrovirus, the retroviral RNA is converted to retroviral DNA, which is then inserted into the DNA of the host cell.
Acute retroviral syndrome symptoms, which include headache, nausea, diarrhoea, and body pains, are comparable to those of the flu and go away on their own in a few of weeks. A person who has acute retroviral syndrome may no longer have any symptoms, yet they are nonetheless HIV-positive and remain contagious.
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From a population of red, brown, orange, yellow, and green butterflies, only the red and green ones survive since they can blend into their environment and reduce predation. Which evolutionary mechanism is involved?
Answer:
Natural Selection
Explanation:
Since the other species don't survive naturally, the red and green ones continue to breed so that their species will continue to live.
Non segmentation allows for evolutionary innovation in body form. True or false
Answer:
True
Explanation:
Could an object, tool, or structure be made without the use of a natural resource? Explain your answer.
Some people use the terms "cell cycle" and "mitosis" as if they were the same thing. Which of these best describes why they are not the same?
a. the cell cycle is just a stage of mitosis
b. mitosis and the cell cycle are different types of cell division that occur in different of cells in a multicellular organism
c. mitosis is a sequence of events within the cell cycle that separates the genetic material
d. mitosis is a type of cell division that occurs in eukaryots and the cell cycle takes place in prokaryots
Answer: C. Cells in meiosis have unique genetic information
Explanation: Meiosis is the cell division that forms four daughter cells from one parent cell. It includes two successive divisions called as meiosis I and meiosis II. Crossing over during prophase I of meiosis I imparts new gene combinations to the daughter cells of meiosis. Hence, daughter cells formed by the end of meiosis have some new gene combinations, that is, unique genetic information.
What is a biological approach to determining when a mother and her conceptus become separate individuals?
Answer:
Electroencephalography.
Explanation:
Electroencephalography is used to measure brain activity in terms of electrical activity. It is done by attaching electrodes on the scalp, or sometimes by placing electrodes directly in the brain. Using electroencephalography can help determine when the fetus starts having its own brain activities, which means that it is now a separate entity distinguishable from its mother. Using electroencephalography to see brain waves can give us a deeper insight into the age old complicated issue of when a mother and her conceptus become separate individuals.
What sections of DNA are used in DNA fingerprinting?
O A. Sections that only contain mRNA
O B. Sections that are unique to each person
O c. Sections that have the fewest mutations
O D. Sections that are made by bacteria
Which of the following is NOT a factor of sustainability?
Group of answer choices
economics
ethics
biodiversity
natural capital
solar energy
Answer:
natural capital
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The levels of nitrogen and ___ in the atmosphere remain fairly constant but the levels of other gases may vary.
Answer:Oxygen
Explanation:
which type of soil is likely to be found in horizon E
Answer:
A layer of pale,Sandy soil lacking clay and iron is likely to be found in horizon E
Answer:
bedrock
Explanation: A layer or bedrock is the type of soil is likely to be found in horizon E. Hence the correct answer is option A among the options. The bed rocks can be regarded very hard and it cannot be breakable.
Epithelial tissue always has an exposed outer surface and an inner surface anchored to connective tissue by a thin, non- cellular structure called the (a) Nonstratified layer (b) Stratified layer (c) Basement membrane (d) Fibroblast
Explanation:
(a)Nonstratified layer
What energy transformations are going on within the skateboarder’s body during this process?
Answer:
When they slide down, they lose this potential energy, which turns into kinetic energy and thermal energy. Thermal Energy - This energy is related to the temperature of a body or a system. When friction is involved in a system, part of the kinetic energy is transformed into thermal energy.
when would a recessive trait be seen in an organism? A. When there is one dominant and one recessive gene for the trait present in the offspring. B. When there are two dominant genes for the trait present in the offspirng. C. When there are two recessive genes for the trait present in the offspring D. Never
Oxygen is produced.
Select one:
O a. Both Photosynthesis and Cellular Respiration
b. Photosynthesis
c. Cellular Respiration
d. Neither Photosynthesis nor Cellular Respiration
Answer:
b.Photosynthesis
Explanation:
as plants produce 02 in the presence of light
Answer:
Option(B):Photosynthesis
Explanation:
Cellular respiration, the process by which organisms combine oxygen with molecules,
in photosynthesis oxygen is produced
HELPPPPP Which of the following pieces of evidence supports that species change due to certain genetic variations? Darwin's theory of evolution was incorrect, as it did not account for variation in a species. Natural selection causes variation but cannot cause the evolution of a new species. Mutation and natural selection both cause changes in a population. Changes in a population abruptly occur as a direct response to the environment.
Answer:
D. Mutation and natural selection both cause changes in a population
Explanation:
I just took the test. Good luck! :)
The two evidences that supports the fact that species change due to certain genetic variations are that mutation and natural selection both cause changes in a population.
What is natural selection?Natural selection is the postulation by Charles Darwin that organisms that are more adapted to their environment live longer and reproduce hence pass on their favorable traits to their offspring.
The two evidences that supports the fact that species change due to certain genetic variations are that mutation and natural selection both cause changes in a population.
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What is the ratio of surface area to volume for a sphere with the following measurements. Surface area = 432m2, volume = 864m3
Answer:
the ratio of the surface area to the volume is 1:2
What is the valence of an atom with six electrons in its outer electron shell?
A)1
B) 2
C) 3
D) 4
E) 5
Answer:
D. Valency is 4
Explanation:
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Choose a strategy to clone genes known only by a mutant phenotype in organisms with highly efficient transformation procedures and relatively small genomes.
a. cloning by complementation
b. direct sequencing of the mutant genome
c. PCR of the gene and transformation of an organism
d. cloning using a specific cloning vector
Answer:
Option a (cloning by complementation) `would be the correct choice.
Explanation:
In species containing extremely efficient transforming techniques as well as comparatively small genomes, cloning by rearrangement testing is performed to clone gene products mostly by a mutated gene as the rearrangement test was being used to detect mutations.This strategy for cloning through mechanism begins with identifying another yeast mutant that affects something like a plasmid representing a cloned genetic material.The other options in question aren't relevant to the particular circumstance. Therefore the answer to the above seems to be the right one.
Taxonomists today tend to group organisms into the same category based on similar what?
Answer:
characteristics
Explanation:
oranisms are grouped based on shared characteristics
Taxonomists today tend to group organisms into the same category based on their evolutionary history and shared ancestry, as explained in Option A, as this allows taxonomists to construct more accurate and detailed phylogenetic trees.
What is taxonomy?The field of taxonomy is concerned with the classification of living organisms based on their shared characteristics, the aim of taxonomy is to group organisms in a way that reflects their evolutionary history and to provide a standardized system of naming, while earlier taxonomists relied on morphological characteristics, such as the physical appearance of an organism, but modern taxonomists instead use molecular and genetic data to group organisms into categories.
Hence, taxonomists today tend to group organisms into the same category based on their evolutionary histories and shared ancestry, as explained in Option A.
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The question is incomplete, complete question is below
Taxonomists today tend to group organisms into the same category based on similar what?
A)based on their evolutionary histories and shared ancestry
B)based on fossils
A purebred tall pea plant is cross-pollinated with a tall, can you please help
heterozygous pea plant. Use a Punnett square to determine the probability the offspring inherita
recessive short allele. (I point)
75%
25%
0%
50%
Answer:
50%
Explanation:
because if you use the box method you see that half receive a short alele
T t
T TT Tt
T TT Tt
When you touch an object that is very hot you quickly pull your hand back.
What is the correct pathway of nerve impulses for this behavior?
Answer:
this is called reflect action
Answer:
reflex action
Explanation:
this is because, it makes it possible to swiftly pull back your hand if you accidentally touch a hot pan
What type of system is used to move the body?
Economic importance of Angiosperm and Gynosperm
Answer:
Angiosperms
1. Production of fruits
2. The plants serve as a source of pharmaceuticals.
3. They also serve as a source of fiber products.
4. Source of timber.
5. Source of ornamentals.
Gymnosperms
1. Production of lumber.
2. Source of seeds of ginko, pinus, cycas, etc.
3. Paper production.
4. Resin production.
5. Soap production.
6. Varnish production.
7. Nail polish production.
8. Gum production.
9. Perfume production.
When an outbreak of foot and mouth disease is discovered among livestock in a country, what is MOST likely the chosen way to control it?
Answer:
You can get infected with hand, foot, and mouth disease if you have the virus on your hands and then touch your eyes, nose, or mouth. To lessen your chance of getting sick, don't touch your eyes, nose, and mouth with unwashed hands.
You can get infected with hand, foot, and mouth disease if you have the virus on your hands and then touch your eyes, nose, or mouth. To lessen your chance of getting sick, don't touch your eyes, nose, and mouth with unwashed hands.
What are the mechanism that use to resist the antimicrobial agents?There has been several mechanisms, like resistance to antimicrobial agents, encapsulation or secretation of proteins that affects and might destroy the phagocyte along with some leukocytes in our body perform phagocytosis as a defense mechanism against the pathogenic bacterium.
These phagocytes contain lysosomes, intracellular granules that possess bactericidal substances. When the phagocyte ingests the pathogen, a phagosome is formed, which merges with the lysosome, forming the phagolysosome, which is where toxic substances and enzymes kill the ingested microorganism.
There are several mechanisms by which a microorganism can survive this process as resistance to antimicrobial agents. Some bacteria use phenolic glycolipids from their cell wall, to eliminate toxic oxygen compounds.
Therefore, You can get infected with hand, foot, and mouth disease if you have the virus on your hands and then touch your eyes, nose, or mouth.
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Reaching for your coffee cup is accomplished by the _____ subdivision of the peripheral nervous system.
Answer:
somatic subdivision
Explanation:
The peripheral nervous system is divided into somatic and autonomic systems. The somatic system is required to transport sensory and motor information to the central nervous system. The somatic system is composed of nerves that connect different parts of the body including sensory fibers, skin, and skeletal muscles. On the other hand, the autonomic system can be subsequently classified into sympathetic and parasympathetic systems, which are required in fight (potentially dangerous) and calm-associated responses, respectively.
List some Characteristic of fruits.
Answer:
Quality factors for fruits include the following— maturity, firmness, the uniformity of size and shape, the absence of defects, skin and flesh color. Many of the same quality factors are described for vegetables, with the addition of texture-related attributes such as turgidity, toughness, and tenderness.
A student hypothesized that EC growth might be affected by the DNA from circulating erythrocytes. Is this student’s hypothesis reasonable?
Answer:
Explanation:
It can be said that this hypothesis is actually not reasonable because circulating erythrocytes do not contain DNA. This can be proven by the Mammalian erythrocytes (rbcs) which ultimately loose their nuclei as well as many other organelles during their maturation process and they don't have nuclei or mitochondria meaning that they are not affected by the DNA.